[an example of MySQL startup error] innodb: failed to create check sector file, errno:13

Error message

I came across one today 5.7MySQL Installation error messages , The error information is as follows :
[ERROR] InnoDB: Failed to create check sector file, errno:13 Please confirm O_DIRECT is supported and remove the file /data1/check_sector_size if it exists.
Although it does not affect the use of , But every time I start up, I have Error Report errors , I always feel that there may be problems in some aspects .

Solution

After review search , It turns out that MySQL One of the bugs.
bug Address ：MySQL bug
The solution is simple ：
Just put the configuration file's innodb_data_home_dir Add one at the end of the parameter value of / that will do .

# Original configuration 
innodb_data_home_dir=/data1/mysql

# Modified configuration 
innodb_data_home_dir=/data1/mysql/
# Just change to the modified configuration , This error will magically disappear 

The above solutions have been tested in the test environment and production environment, and can really solve the error .